A field experiment on sweet basil was conducted to study the effect of spacing and organic weed management on growth and development of sweet basil under temperate conditions of Kashmir. Among weed management practices walnut hull aqueous solution spray (1:10) at the time of planting + hand weeding 20- 25 DAT + walnut hull aqueous solution sprays just after hand weeding / hoeing (W₆) recorded significantly higher plant height, number of functional leaves, leaf area index, number of primary and secondary branches, dry matter accumulation, spike length, number of spikes plant^-1, number of spikelets spike^-1, number of spikelets plant^-1, number of seeds spike^-1, number of seeds plant^-1, seed weight plant^-1, test weight, fresh herbage yield, dry herbage yield per hectare, seed yield, harvest index. Spacing of 30cm × 30cm (S₃₀) recorded significantly higher pant height as compared to other spacing however, 40cm × 30cm (S₄₀) spacing recorded significantly higher no. of functional leaves, LAI, dry matter accumulation and fresh herbage yield. Spacing of 50cm × 30cm (S₅₀) recorded significantly higher no. of primary and secondary branches spike length, number of spikes plant^-1, number of spikelets spike^-1, number of spikelets plant^-1, number of seeds spike^-1, number of seeds plant^-1,seed weight plant^-1 and test weight.